Hydroxyapatite–Titania nanotube composite as a coating layer on Co–Cr-based implants: Mechanical and electrochemical optimization
作者： Mostafa Rezazadeh Shirdar , Mohammad Mahdi Taheri , Hossein Moradifard , Ali Keyvanfar , Arezou Shafaghat
DOI: 10.1016/J.CERAMINT.2016.01.080
关键词:
摘要: Abstract Inadequate mechanical properties of pure hydroxyapatite (HA) coating layers make it an unsuitable candidate for many load-bearing orthopedic implants. In this study, Titania nanotubes (TNT) and HA were synthesized using Rapid Breakdown Adonization (RBA) sol–gel methods, respectively. The sintering process at different temperatures was then conducted the phase transformation titanium. HA–TNT mixtures in quantities phases prepared on Co–Cr-based substrates. To optimize coated composite layer term hardness, bonding strength corrosion potential, empirical models based Response Surface Methodology (RSM) developed. TNT samples characterized X-ray diffraction (XRD), Field Emission Scanning Electron Microscope (FESEM) Transmission Microscopy (TEM). predicted generated by RSM compared with experimental results, close agreement observed. While demonstrate that quantity is a more significant factor than temperature improving hardness (H), (P) potential (Ecorr) substrate, still has considerable effect H Ecorr. optimum terms electrochemical obtained ratio 1.07 (wt%) 669.11 °C.
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